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sf

noun

sf is spelled S-F: 2 letters. It appears 7.6 times per million words in written English, the 8,542nd most frequent word form (wordfreq, 2021 data). As a noun, sf means “Alternative form of SF (science fiction)” (English Wiktionary, September 2026).

How many letters and syllables are in sf?

Letters2: S-F
In writing7.6 times per million words; the 8,542nd most frequent word form
Wrong spellings searchednone measured in search
Pairs people search

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).

How common is sf?

Sf appears 7.6 times per million words in written English, the 8,542nd most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

Words people confuse with sf

Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).

s-f vs sf0 B

Also written: s-f (one word or two).

Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).

What does sf mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    datedAlternative form of SF (science fiction)

  2. 2

    Abbreviation of significant figure(s).

noun

as SF
  1. 1

    Initialism of science fiction or speculative fiction, often used to avoid having to choose between the two.

  2. 2

    Initialism of square feet.

  3. 3

    Initialism of spontaneous fission.

  4. 4

    Initialism of small forward.

  5. 5

    Abbreviation of semifinal.

  6. 6

    Initialism of single female.

adjective

as SF
  1. 1

    Initialism of smoker-friendly: not objecting to people who smoke tobacco.

noun

as Sf
  1. 1

    a book size one sixty-fourth of the size of a standard uncut sheet of paper (less 7.5 cm (3") in height)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after sf